GB 47485-2026 Hanging gas fire extinguishing equipment
1 Scope
This document specifies the requirements, inspection rules, requirements for preparation of instruction manuals, marking, packaging, transportation and storage for hanging gas fire extinguishing equipment (hereinafter referred to as “extinguishing equipment”), provides the classification, designation and model of hanging gas fire extinguishing equipment, and describes the corresponding test methods.
This document is applicable to the design, manufacture and inspection of hanging HFC-227ea gas fire extinguishing equipment and hanging HFC-236fa gas fire extinguishing equipment.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 5135.1-2019 Automatic sprinkler system - Part 1: Sprinklers
GB/T 8979 Pure nitrogen, high purity nitrogen and ultra-pure nitrogen
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB 18614 Fire extinguishing agent heptafluoropropane (227ea)
GB 25971 Fire extinguishing agent hexafluoropropane (HFC236fa)
GB 25972-2010 Gas fire extinguishing systems and components
XF 61 General technical specifications of actuating and control devices of fixed extinguishing systems
XF 1203 Extinguishing agent filling rules for gaseous fire extinguishing systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 25972-2024 and the following apply.
3.1
hanging gas fire extinguishing equipment
fire extinguishing equipment consisting of an extinguishing agent storage container, a temperature sensing actuation assembly (if applicable), a container valve (if applicable), a hanging bracket (base), etc., installed in a hanging or wall‑mounted manner, capable of being automatically or manually activated to discharge a gaseous fire extinguishing agent
3.2
temperature sensing actuation assembly
device that has functions such as storing fire extinguishing agent, activating the fire extinguishing equipment by temperature sensing, and releasing the fire extinguishing agent
4 Classification, designation and models
4.1 Classification and designation
4.1.1 Classification and designation according to the installation method of the fire extinguishing equipment are shown in Table 1.
Table 1 Classification and designation of fire extinguishing equipment
Installation of fire extinguishing equipment Hanging type Wall-mounted type Hanging and wall-mounted type
Designation X B XB
4.1.2 Classification and designation according to the type of extinguishing agent filled are shown in Table 2.
Table 2 Classification and designation of extinguishing agent filled
Type of extinguishing agent filled Fire extinguishing agent heptafluoropropane Fire extinguishing agent hexafluoropropane
Designation Q L
4.1.3 Classification and designation according to the actuation mode are shown in Table 3.
Table 3 Classification and designation according to the actuation mode
Actuation mode Electromagnetic actuation Temperature sensing actuation Electric actuation Electrical initiation actuation Thermal initiation actuation Other actuation
Designation C W D Y R Q
4.2 Model
The method of model designation for fire extinguishing equipment is shown in Figure 1.
× × × × ×/×-×
Figure 1 Model designation for fire extinguishing equipment
Example: XXQC20/1.6-a indicates the hanging gas fire extinguishing equipment with the enterprise-defined code of a, storage pressure of 1.6 MPa, nominal volume of 20 L, electromagnetic actuation, filled with the extinguishing agent heptafluoropropane.
5 Requirements
5.1 Fire extinguishing equipment
5.1.1 Components
Temperature sensing fire extinguishing equipment and thermal initiation actuation fire extinguishing equipment shall consist of an extinguishing agent storage container, an extinguishing agent sampling port, a temperature sensing actuation assembly, a leak detection device, a signal feedback device (if applicable) and an trigger (if applicable), etc.
Electric actuation fire extinguishing equipment shall consist of an extinguishing agent storage container, an extinguishing agent sampling port, a container valve, a leak detection device, a signal feedback device (if applicable), a nozzle and an actuating device, etc.
5.1.2 Appearance
5.1.2.1 All components of the fire extinguishing equipment shall be free from visible manufacturing defects or mechanical damage, and the outer surface of components subjected to anti-corrosion treatment shall have a complete and uniform anti-corrosion coating or plating.
5.1.2.2 The nameplate shall be firmly fixed on an obvious part of the fire extinguishing equipment, and the content on the nameplate shall comply with the requirements of Clause 8.
5.1.2.3 The warning sign of the fire extinguishing equipment shall be firmly fixed on an obvious part of the equipment, indicating “This equipment decomposes and produces a certain amount of hydrogen fluoride gas during fire extinguishing”. The content on the warning sign shall be clearly readable from a distance of 3 m under ambient light of 100 lx to 500 lx.
5.1.3 Main parameters of fire extinguishing equipment
The main parameters of fire extinguishing equipment shall meet the requirements of Table 4.
5.1.4 Requirements for extinguishing agent and pressurizing gas
5.1.4.1 Fire extinguishing agent heptafluoropropane shall meet the requirements of GB 18614.
5.1.4.2 Fire extinguishing agent hexafluoropropane shall meet the requirements of GB 25971.
5.1.4.3 Pressurizing gas shall meet the requirements of GB/T 8979.
Table 4 Main parameters of fire extinguishing equipment
Type Working temperature rangea ℃ Storage pressure
(at +20℃)
MPa Maximum working pressure
(at +50℃)
MPa Minimum working pressure
(At 0℃) MPa Maximum filling density kg/m3
Hanging heptafluoropropane fire extinguishing equipment 0~ +50 1.6 2.5 1.2 1150
2.5 4.2 2.0
Hanging hexafluoropropane fire extinguishing equipment
0~ +50 0.8 1.3 0.6
1200
1.2 2.6 1.0
1.6 3.2 1.2
2.5 4.0 2.0
For fire extinguishing equipment with other storage pressures, the maximum and minimum working pressures shall be verified by tests according to the method specified in Annex B of GB 25972-2024.
a When the working temperature range exceeds the provisions of Table 4, the actual operating temperature range shall be marked on the fire extinguishing equipment. The relevant performance requirements and test methods for the device and its components shall also be adjusted according to the actual temperature range.
5.1.5 Actuation mode
5.1.5.1 The fire extinguishing equipment shall be provided with an automatic actuation mode, and may also be supplemented with manual and mechanical emergency actuation modes.
5.1.5.2 The operating force of the mechanical emergency operating mechanism shall not exceed 150 N; the finger-pulling force shall not exceed 50 N; the finger-pushing force shall not exceed 10 N; the operating stroke shall not exceed 300 mm. The release force of the locking device of mechanical emergency actuation mode shall not exceed 100 N.
5.1.6 Insulation requirements
Under normal atmospheric conditions, the insulation resistance between the external live terminals requiring insulation on the fire extinguishing equipment and the device shall be greater than 20 MΩ; the insulation resistance between the power plug and the device shall be greater than 50 MΩ.
5.1.7 Vibration resistance requirements
When the vibration test is carried out according to the method specified in 6.5, no component of the fire extinguishing equipment shall be loose, detached or structurally damaged. The net mass loss of the extinguishing agent shall not exceed 0.5% of the extinguishing agent filled, and the pressure loss shall not exceed 1% of the filling pressure. After the test, the fire extinguishing equipment shall be activated automatically or manually without any malfunction.
5.1.8 Requirements for temperature cycle leakage
When the temperature cycling leakage test is carried out according to the method specified in 6.6, the net mass loss of the extinguishing agent inside the fire extinguishing equipment shall not exceed 0.5% of the extinguishing agent filled, and the pressure loss shall not exceed 1.5% of the filling pressure. After the test, the fire extinguishing equipment shall be activated automatically or manually without any malfunction.
5.1.9 Concentration distribution performance
When the concentration distribution test is carried out according to the method specified in 6.7, the fire shall be extinguished within 30 s after the end of discharge.
Contents
Foreword Ⅲ
Introduction Ⅳ
1 Scope
2 Normative reference
3 Terms and definitions
4 Classification, designation and model
4.1 Classification and designation
4.2 Model
5 Requirements
5.1 Fire extinguishing equipment
5.2 Container
5.3 Container valve
5.4 Safety relief device
5.5 Temperature sensing actuation assembly
5.6 Trigger
5.7 Leak detection device
5.8 Nozzle
5.9 Signal feedback device
5.10 Actuating device
5.11 Hanging bracket (seat)
5.12 Filling of extinguishing agent
6 Test methods
6.1 General requirements for tests
6.2 Inspection of composition, appearance, materials, extinguishing agent, pressurizing gas, container
6.3 Manual operation test
6.4 Insulation resistance measurement
6.5 Vibration test
6.6 Temperature cycling test
6.7 Concentration distribution test
6.8 Fire extinguishing test of local application fire extinguishing equipment
6.9 Performance test of container valve
6.10 Performance test of safety relief device
6.11 Performance test of temperature release assembly
6.12 Performance test of trigger
6.13 Performance test of leak detection device
6.14 Performance test of nozzle
6.15 Performance test of signal feedback device
6.16 Performance test of actuating device
6.17 Load‑bearing capacity test of hanging bracket (seat)
6.18 Other performance test of hanging bracket (seat)
7 Inspection rules
7.1 Classification and items of inspection
7.2 Sampling method and sample quantity
7.3 Judgment of inspection results
8 Marking
9 Packaging, transportation and storage
10 Requirements for preparation of instruction manual
Annex A (Informative) Fire extinguishing concentration for class B n‑heptane fire and class A wood crib surface fire
Annex B (Normative) Test procedure and sample quantity for fire extinguishing equipment
B.1 Test procedure
B.2 Sample quantity
Annex C (Normative) Test procedure and sample quantity for temperature sensing actuation assembly
C.1 Test procedure
C.2 Sample quantity
Annex D (Normative) Test procedure and sample quantity for hanging bracket (seat)
D.1 Test procedure
D.2 Sample quantity
Annex E (Normative) Test procedure and sample quantity for electrical triggers
E.1 Test procedure
E.2 Sample quantity
Annex F (Normative) Test procedure and sample quantity for thermal triggers
Annex G (Normative) Test procedure and sample quantity for containers and other components
Standard
GB 47485-2026 Hanging gas fire extinguishing equipment (English Version)
GB 47485-2026 Hanging gas fire extinguishing equipment
1 Scope
This document specifies the requirements, inspection rules, requirements for preparation of instruction manuals, marking, packaging, transportation and storage for hanging gas fire extinguishing equipment (hereinafter referred to as “extinguishing equipment”), provides the classification, designation and model of hanging gas fire extinguishing equipment, and describes the corresponding test methods.
This document is applicable to the design, manufacture and inspection of hanging HFC-227ea gas fire extinguishing equipment and hanging HFC-236fa gas fire extinguishing equipment.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 5135.1-2019 Automatic sprinkler system - Part 1: Sprinklers
GB/T 8979 Pure nitrogen, high purity nitrogen and ultra-pure nitrogen
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB 18614 Fire extinguishing agent heptafluoropropane (227ea)
GB 25971 Fire extinguishing agent hexafluoropropane (HFC236fa)
GB 25972-2010 Gas fire extinguishing systems and components
XF 61 General technical specifications of actuating and control devices of fixed extinguishing systems
XF 1203 Extinguishing agent filling rules for gaseous fire extinguishing systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 25972-2024 and the following apply.
3.1
hanging gas fire extinguishing equipment
fire extinguishing equipment consisting of an extinguishing agent storage container, a temperature sensing actuation assembly (if applicable), a container valve (if applicable), a hanging bracket (base), etc., installed in a hanging or wall‑mounted manner, capable of being automatically or manually activated to discharge a gaseous fire extinguishing agent
3.2
temperature sensing actuation assembly
device that has functions such as storing fire extinguishing agent, activating the fire extinguishing equipment by temperature sensing, and releasing the fire extinguishing agent
4 Classification, designation and models
4.1 Classification and designation
4.1.1 Classification and designation according to the installation method of the fire extinguishing equipment are shown in Table 1.
Table 1 Classification and designation of fire extinguishing equipment
Installation of fire extinguishing equipment Hanging type Wall-mounted type Hanging and wall-mounted type
Designation X B XB
4.1.2 Classification and designation according to the type of extinguishing agent filled are shown in Table 2.
Table 2 Classification and designation of extinguishing agent filled
Type of extinguishing agent filled Fire extinguishing agent heptafluoropropane Fire extinguishing agent hexafluoropropane
Designation Q L
4.1.3 Classification and designation according to the actuation mode are shown in Table 3.
Table 3 Classification and designation according to the actuation mode
Actuation mode Electromagnetic actuation Temperature sensing actuation Electric actuation Electrical initiation actuation Thermal initiation actuation Other actuation
Designation C W D Y R Q
4.2 Model
The method of model designation for fire extinguishing equipment is shown in Figure 1.
× × × × ×/×-×
Figure 1 Model designation for fire extinguishing equipment
Example: XXQC20/1.6-a indicates the hanging gas fire extinguishing equipment with the enterprise-defined code of a, storage pressure of 1.6 MPa, nominal volume of 20 L, electromagnetic actuation, filled with the extinguishing agent heptafluoropropane.
5 Requirements
5.1 Fire extinguishing equipment
5.1.1 Components
Temperature sensing fire extinguishing equipment and thermal initiation actuation fire extinguishing equipment shall consist of an extinguishing agent storage container, an extinguishing agent sampling port, a temperature sensing actuation assembly, a leak detection device, a signal feedback device (if applicable) and an trigger (if applicable), etc.
Electric actuation fire extinguishing equipment shall consist of an extinguishing agent storage container, an extinguishing agent sampling port, a container valve, a leak detection device, a signal feedback device (if applicable), a nozzle and an actuating device, etc.
5.1.2 Appearance
5.1.2.1 All components of the fire extinguishing equipment shall be free from visible manufacturing defects or mechanical damage, and the outer surface of components subjected to anti-corrosion treatment shall have a complete and uniform anti-corrosion coating or plating.
5.1.2.2 The nameplate shall be firmly fixed on an obvious part of the fire extinguishing equipment, and the content on the nameplate shall comply with the requirements of Clause 8.
5.1.2.3 The warning sign of the fire extinguishing equipment shall be firmly fixed on an obvious part of the equipment, indicating “This equipment decomposes and produces a certain amount of hydrogen fluoride gas during fire extinguishing”. The content on the warning sign shall be clearly readable from a distance of 3 m under ambient light of 100 lx to 500 lx.
5.1.3 Main parameters of fire extinguishing equipment
The main parameters of fire extinguishing equipment shall meet the requirements of Table 4.
5.1.4 Requirements for extinguishing agent and pressurizing gas
5.1.4.1 Fire extinguishing agent heptafluoropropane shall meet the requirements of GB 18614.
5.1.4.2 Fire extinguishing agent hexafluoropropane shall meet the requirements of GB 25971.
5.1.4.3 Pressurizing gas shall meet the requirements of GB/T 8979.
Table 4 Main parameters of fire extinguishing equipment
Type Working temperature rangea ℃ Storage pressure
(at +20℃)
MPa Maximum working pressure
(at +50℃)
MPa Minimum working pressure
(At 0℃) MPa Maximum filling density kg/m3
Hanging heptafluoropropane fire extinguishing equipment 0~ +50 1.6 2.5 1.2 1150
2.5 4.2 2.0
Hanging hexafluoropropane fire extinguishing equipment
0~ +50 0.8 1.3 0.6
1200
1.2 2.6 1.0
1.6 3.2 1.2
2.5 4.0 2.0
For fire extinguishing equipment with other storage pressures, the maximum and minimum working pressures shall be verified by tests according to the method specified in Annex B of GB 25972-2024.
a When the working temperature range exceeds the provisions of Table 4, the actual operating temperature range shall be marked on the fire extinguishing equipment. The relevant performance requirements and test methods for the device and its components shall also be adjusted according to the actual temperature range.
5.1.5 Actuation mode
5.1.5.1 The fire extinguishing equipment shall be provided with an automatic actuation mode, and may also be supplemented with manual and mechanical emergency actuation modes.
5.1.5.2 The operating force of the mechanical emergency operating mechanism shall not exceed 150 N; the finger-pulling force shall not exceed 50 N; the finger-pushing force shall not exceed 10 N; the operating stroke shall not exceed 300 mm. The release force of the locking device of mechanical emergency actuation mode shall not exceed 100 N.
5.1.6 Insulation requirements
Under normal atmospheric conditions, the insulation resistance between the external live terminals requiring insulation on the fire extinguishing equipment and the device shall be greater than 20 MΩ; the insulation resistance between the power plug and the device shall be greater than 50 MΩ.
5.1.7 Vibration resistance requirements
When the vibration test is carried out according to the method specified in 6.5, no component of the fire extinguishing equipment shall be loose, detached or structurally damaged. The net mass loss of the extinguishing agent shall not exceed 0.5% of the extinguishing agent filled, and the pressure loss shall not exceed 1% of the filling pressure. After the test, the fire extinguishing equipment shall be activated automatically or manually without any malfunction.
5.1.8 Requirements for temperature cycle leakage
When the temperature cycling leakage test is carried out according to the method specified in 6.6, the net mass loss of the extinguishing agent inside the fire extinguishing equipment shall not exceed 0.5% of the extinguishing agent filled, and the pressure loss shall not exceed 1.5% of the filling pressure. After the test, the fire extinguishing equipment shall be activated automatically or manually without any malfunction.
5.1.9 Concentration distribution performance
When the concentration distribution test is carried out according to the method specified in 6.7, the fire shall be extinguished within 30 s after the end of discharge.
Contents of GB 47485-2026
Contents
Foreword Ⅲ
Introduction Ⅳ
1 Scope
2 Normative reference
3 Terms and definitions
4 Classification, designation and model
4.1 Classification and designation
4.2 Model
5 Requirements
5.1 Fire extinguishing equipment
5.2 Container
5.3 Container valve
5.4 Safety relief device
5.5 Temperature sensing actuation assembly
5.6 Trigger
5.7 Leak detection device
5.8 Nozzle
5.9 Signal feedback device
5.10 Actuating device
5.11 Hanging bracket (seat)
5.12 Filling of extinguishing agent
6 Test methods
6.1 General requirements for tests
6.2 Inspection of composition, appearance, materials, extinguishing agent, pressurizing gas, container
6.3 Manual operation test
6.4 Insulation resistance measurement
6.5 Vibration test
6.6 Temperature cycling test
6.7 Concentration distribution test
6.8 Fire extinguishing test of local application fire extinguishing equipment
6.9 Performance test of container valve
6.10 Performance test of safety relief device
6.11 Performance test of temperature release assembly
6.12 Performance test of trigger
6.13 Performance test of leak detection device
6.14 Performance test of nozzle
6.15 Performance test of signal feedback device
6.16 Performance test of actuating device
6.17 Load‑bearing capacity test of hanging bracket (seat)
6.18 Other performance test of hanging bracket (seat)
7 Inspection rules
7.1 Classification and items of inspection
7.2 Sampling method and sample quantity
7.3 Judgment of inspection results
8 Marking
9 Packaging, transportation and storage
10 Requirements for preparation of instruction manual
Annex A (Informative) Fire extinguishing concentration for class B n‑heptane fire and class A wood crib surface fire
Annex B (Normative) Test procedure and sample quantity for fire extinguishing equipment
B.1 Test procedure
B.2 Sample quantity
Annex C (Normative) Test procedure and sample quantity for temperature sensing actuation assembly
C.1 Test procedure
C.2 Sample quantity
Annex D (Normative) Test procedure and sample quantity for hanging bracket (seat)
D.1 Test procedure
D.2 Sample quantity
Annex E (Normative) Test procedure and sample quantity for electrical triggers
E.1 Test procedure
E.2 Sample quantity
Annex F (Normative) Test procedure and sample quantity for thermal triggers
Annex G (Normative) Test procedure and sample quantity for containers and other components
